| Tye Sheridan | .... | Parzival / Wade |
| Olivia Cooke | .... | Art3mis / Samantha |
| Ben Mendelsohn | .... | Sorrento |
| Lena Waithe | .... | Aech / Helen |
| T. J. Miller | .... | I-R0k |
| Simon Pegg | .... | Curator / Ogden Morrow |
| Mark Rylance | .... | Anorak / Halliday |
| Philip Zhao | .... | Sho |
| Win Morisaki | .... | Daito |
| Hannah John-Kamen | .... | F'Nale Zandor |
| Ralph Ineson | .... | Rick |
| Susan Lynch | .... | Alice |
| Clare Higgins | .... | Mrs. Gilmore |
| Laurence Spellman | .... | Lame Tattoo Guy (Reb) |
| Perdita Weeks | .... | Kira |
| Joel MacCormack | .... | Sixer #6655 |
| Kit Connor | .... | Reb Kid |
| Leo Heller | .... | Reb Kid |
| Antonio Mattera | .... | Reb Kid |
| Ronke Adekoluejo | .... | Sorrento's Assistant |
| William Gross | .... | Ten Year Old Kid |
| Gareth Mason | .... | Chubby Guy |
| Sandra Dickinson | .... | Old Boxing Woman |
| Lynne Wilmot | .... | Pole Dancer |
| Jayden Fowora-Knight | .... | Boy Playing Tennis |
| Gavin Marshall | .... | Shift Manager / Mocap Core Cast |
| Mark Stanley | .... | Old Zombie Woman |
| Emily Beacock | .... | Twin |
| Rosanna Beacock | .... | Twin |
| Gem Refoufi | .... | Pretty Naked Girl Body Double |
| Jane Leaney | .... | Queen of Cats / Bathroom Zombie / Mocap Core Cast |
| Elliot Barnes-Worrell | .... | Sixer #1 |
| Asan N'Jie | .... | Sixer #5 (Last Sixer) |
| Robert Gilbert | .... | Andrew (Sorrento's Head of Security) |
| Stephen Mitchell | .... | Police Officer |
| Letitia Wright | .... | Reb (Safe House) |
| Kae Alexander | .... | Reb (Safe House) |
| Josh Jefferies | .... | Mocap Core Cast / Sixer Instructor |
| Avye Leventis | .... | Mocap Core Cast / Female Sixer #2 |
| Dean Street | .... | Mocap Core Cast |
| Michael Wildman | .... | Sixer Drill Instructor |
| Turlough Convery | .... | Chief Oology Expert |
| Joe Hurst | .... | Oology Expert |
| Eric Sigmundsson | .... | Oology Expert |
| James Dryden | .... | Oology Expert |
| Danielle Phillips | .... | Oology Expert |
| Rona Morison | .... | Oology Expert |
| Khalil Madovi | .... | Oology Expert |
| Bruce Lester Johnson | .... | IOI Board Member |
| Tom Turner | .... | IOI Board Member |
| Paul Barnhill | .... | Sorrento's Man |
| Isaac Andrews | .... | Halliday 7 Years Old |
| Maeve Bluebell Wells | .... | Female Sixer #1 |
| Neet Mohan | .... | Snacks (Bootsuit Commercial) |
| Georgie Farmer | .... | Kid (Bootsuit Commercial) |
| Kathryn Wilder | .... | Female Gamer (Bootsuit Commercial) |
| Sid Sagar | .... | Regular Guy (Bootsuit Commercial) |
| David Forman | .... | Hong Kong Businessman |
| Ian Davies | .... | Police Officer (Stacks Explosion) |
| Lulu Wilson | .... | Elementary Kid |
| Adolfo Alvarez | .... | Elementary Kid |
| Alonso Alvarez | .... | Elementary Kid |
| Jadah Marie | .... | Elementary Kid |
| Dallas Young | .... | Elementary Kid |
| Mckenna Grace | .... | Elementary Kid |
| Arianna Jaffier | .... | High School Kid |
| Armani Jackson | .... | High School Kid |
| Britain Dalton | .... | High School Kid |
| Jacob Bertrand | .... | High School Kid |
| Daniel Zolghadri | .... | High School Kid |
| Sydney Brower | .... | Girl in Bedroom at House |
| Cara Pifko | .... | Leslee |
| Vic Chao | .... | Goro |
| Cara Theobold | .... | Tracer |
| Clare Angelini. Heather | .... | Sub Rebel (uncredited) |
| Raed Abbas | .... | Willy Junior (uncredited) |
| Peter Alberti | .... | Zandor's Technician (uncredited) |
| Jermaine Allen | .... | Rebel (uncredited) |
| Naana Agyei Ampadu | .... | Gospel Singer (uncredited) |
| Elisabeth Anisimow | .... | Gamer Kid (uncredited) |
| Alphonso Austin | .... | Sixer (uncredited) |
| David Barrera | .... | Guy on Bus (uncredited) |
| Amy Clare Beales | .... | Shop Staff (uncredited) |
| Paul Bean | .... | IOI Security Staff (uncredited) |
| Lia Beldam | .... | Pretty Naked Girl(archive footage) (uncredited) |
| Kiera Bell | .... | IOI Staff (uncredited) |
| Jaeden Bettencourt | .... | Soccer Player (uncredited) |
| Gordon Bibby | .... | Stacks Mob Leader (uncredited) |
| Donovan Blackwood | .... | Gospel Singer (uncredited) |
| Annarie Boor | .... | Sixer (uncredited) |
| Darryl Bradford | .... | Oasis Pedestrian (uncredited) |
| Juan Carlos Cantu | .... | Bus Passenger (uncredited) |
| Fanny Carbonnel | .... | Sixer (uncredited) |
| Ray Ray Chase | .... | Bus Goer (uncredited) |
| Emme Chisholm | .... | Classroom Kid (uncredited) |
| Jasmine Church | .... | High School Girl (uncredited) |
| Justin Cosh | .... | Player (uncredited) |
| Avery Franklin Davis | .... | Elementary Student (uncredited) |
| Nick Davison | .... | Niner (uncredited) |
| Marty Dew | .... | Dancer (uncredited) |
| Jane Douglas | .... | Sixer (uncredited) |
| Daniel Duru | .... | Barber (uncredited) |
| Julian Edwards | .... | Supermarket Kid #2 (uncredited) |
| Daniel Eghan | .... | Corporate Businessman (uncredited) |
| Nousha Flore | .... | School Kid (uncredited) |
| Gloria Garcia | .... | IOI Staff (uncredited) |
| Fatah Ghedi | .... | Sixer (uncredited) |
| Sade Giliberti | .... | Stacks Resident (uncredited) |
| Rudy Valentino Grant | .... | Caravan Stacks Tenant (uncredited) |
| Shane Griffin | .... | Core Sixer (uncredited) |
| Paulette Harris-German | .... | Blue Collar Worker (uncredited) |
| Carter Hastings | .... | Kid at Home (uncredited) |
| Alfred Hsing | .... | Chinese Gamer (uncredited) |
| A. J. Hudson | .... | Friend (uncredited) |
| Danny Jackson | .... | Player (uncredited) |
| Nasir Jama | .... | Cafe Patron (uncredited) |
| Michelle Jeffers | .... | Games Player (uncredited) |
| Lucas Jones | .... | Sub Rebel (uncredited) |
| Arun Kapur | .... | Fighter (uncredited) |
| Ben Kelleher | .... | IOI Staff Member (uncredited) |
| Paul Kenward | .... | Stacks Pizza Paul (uncredited) |
| Amanda LaCount | .... | High School Student (uncredited) |
| Jorge Leon Martinez | .... | Sixer (uncredited) |
| Lynn Ann Leveridge | .... | Zombie Axe Lady (uncredited) |
| Sylvester Livingstone | .... | Blue Collar Worker (uncredited) |
| Bobby Mahmi | .... | Office Worker (uncredited) |
| Kenny-Lee Mbanefo | .... | Corporate Businessman (uncredited) |
| Rita McDonald Damper | .... | Passer-by (uncredited) |
| Violet McGraw | .... | Shopping Cart Kid (uncredited) |
| Adam Millard | .... | Blue Collar Worker (uncredited) |
| Morris Minelli | .... | Oology Expert (uncredited) |
| Andre Myers | .... | Virtual Reality Creature (uncredited) |
| Julia Nickson | .... | JN / Commuter (uncredited) |
| Mal Nisbett | .... | SWAT and Passer By (uncredited) |
| Emeson Nwolie | .... | Blue Collar Worker (uncredited) |
| Jean Pierre Nyamangunda | .... | Sixer (uncredited) |
| Hugh O'Brien | .... | Technician VR (uncredited) |
| Racheal Ofori | .... | Beautiful Woman (uncredited) |
| Chuey Okoye | .... | OASIS Player (uncredited) |
| Baltazar Oliva | .... | Stacks Resident (uncredited) |
| Steven Peace | .... | IOI SWAT Team / Rebel (uncredited) |
| Elisa Perry | .... | Shopper (uncredited) |
| Jacqueline Ramnarine | .... | Stacks Worker (uncredited) |
| Blake Ridder | .... | Hong Kong Office Worker (uncredited) |
| Margaret Robson | .... | Blue Collar (uncredited) |
| Samantha Russell | .... | Player (uncredited) |
| Di Vinci SanTana | .... | Soccer Goalie (uncredited) |
| Julian Seager | .... | Stacks Dweller (uncredited) |
| Sarah Sharman | .... | Sixer (uncredited) |
| Alicia Shenreice | .... | Stacks Resident (uncredited) |
| Clem So | .... | Stacks Dweller (uncredited) |
| William Spain | .... | Stacks Reb (uncredited) |
| Albert Tang | .... | Contemporary Stacks Resident (uncredited) |
| Fran Targ | .... | Blue Collar Worker (uncredited) |
| Brayden Titus | .... | Soccer Player (uncredited) |
| Daniel Tuite | .... | Lajeremy Johnson (uncredited) |
| Mandy June Turpin | .... | Actor (uncredited) |
| Anthony Wallyn | .... | Goro (uncredited) |
| Mariah Watkins | .... | Soccer Player (uncredited) |
| Trevor Watts | .... | Blue Collar Worker (uncredited) |
| Tom Whelehan | .... | Homeless OASIS Player (uncredited) |